JPH0326490Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a water-sealed center that can be used in rainy or humid places, that is, in bad environments, or in places such as boats, yachts, and other places on the water that are easily exposed to waves and spray. Regarding focus type binoculars.

Conventional water-sealed binoculars are limited to the IF focus type, in which the left and right eyepieces are adjusted individually to adjust the focus. However, there was a drawback that the focus adjustment operation could not be performed easily.

On the other hand, in center focus binoculars, the left and right eyepiece tubes or objective tubes are raised and lowered at the same time using levers or wheels, etc., and the left and right eyelids can be freely adjusted. , or because one end of a connecting member that moves forward and backward by the operation of a focus ring or the like is attached to one of the objective tube or eyepiece tube, a slit corresponding to the moving distance of the connecting member is attached to the other wall of the objective tube or eyepiece tube. is formed.

Therefore, it has been considered extremely difficult to seal the slit portion, that is, to make the objective lens or eyepiece lens waterproof.

The technical challenge of this invention is to water-seal center focus type binoculars, and to maintain the focus mechanism and objective tube without damaging the appearance.
Forming a water seal function consisting of a deformable sealing member with both ends open between the eyepiece tubes, and by forming the water seal function, preventing rainwater from entering the objective tube or the eyepiece tube,
It also protects the objective lens or eyepiece.

Technical means to solve the above technical problems,
In other words, the configuration is such that one end is fixed to the objective barrel side of a lens barrel consisting of an eyepiece barrel and an objective barrel, and the other end is engaged with the engagement groove of a semi-disc-shaped slider, and a connecting member is connected to the left and right lens barrels. In center focus type binoculars, the focus is adjusted by changing the relative position of the objective tube and the eyepiece tube, and the seal is a deformable cylindrical body that is open at both ends. The connection is made of a member and is fastened via a ring to the outer periphery of the opening of the slit of the lens barrel, the opening on the lens barrel side having a cut groove formed on the outer periphery, and the connecting member side opening forming the cut groove on the outer periphery. A water seal mechanism for center focus type binoculars with freely adjustable eye lids, characterized in that the water seal mechanism is fastened to the outer periphery of a member via a ring.

The effects achieved by the above technical configuration are as follows.

In other words, a connecting member that transmits the displacement caused by the operation of the focus mechanism to the eyepiece tube or objective tube has a slit formed at a place through which the objective tube or eyepiece tube is inserted, and a slit formed at the opening periphery of the slit and an opening at both ends on the outer periphery of the connecting member. Since the structure is such that the seal is formed by a deformable cylindrical body that is fastened, the connecting member for relatively displacing the eyepiece tube and objective tube can be freely displaced in a sealed state without using a complicated sealing mechanism. This prevents rainwater from entering the objective tube or eyepiece tube, and also protects the objective lens or eyepiece.Moreover, the cylindrical body is fastened between the periphery of the opening of the slit and the connection member. The cylindrical body can be easily attached because it only needs to be attached to two locations on the outer periphery. Next, an embodiment of the present invention will be described based on the drawings. FIG. 1 is a sectional view showing an embodiment of the center focus type binoculars of the present invention, and FIG. 2 is an enlarged sectional view taken along the line A--A in FIG. 1.

In Figures 1 and 2, 1 is a center-focus type binocular, in which a pair of left and right lens barrels 2 and 3 are connected to each other at their barrels, and the barrels 2 and 3 are connected to each other according to the distance between the user's eyes. By expanding, the distance between the axes of the lens barrels 2 and 3 can be changed.

In this embodiment, a diopter adjustment ring 2a is provided on the eyepiece side of the lens barrel 2 for the left eye.

In this embodiment, the structure of the lens barrels 2 and 3 is as follows:
The objective tube 5 is fitted around the outer periphery of the eyepiece tube 5 so as to be slidable relative to each other, and the focus can be adjusted by changing the relative positions of the objective tube 5 and the eyepiece tube 4.

The focus adjustment mechanism 6 is provided between both lens barrels 2 and 3, and a focus ring 8 is provided at the tip of a central shaft barrel 7 that passes through the connecting portion of each body. The objective cylinder 5 is configured to be displaced by a connecting member 9 that is displaced by a dynamic operation.

That is, a shaft 7a that moves forward and backward in the axial direction is screwed into the center shaft cylinder 7, and a semicircular plate-shaped slider 10 is fixed with screws to the non-threaded portion of the shaft 7a. .

20 is a set screw.

Engagement grooves 10a with which one end of the connecting member 9 engages are formed on both sides of the slider 10, and the connecting member 9 whose one end is engaged with the engaging groove 10a has the other end. It is screwed and fixed to the side wall of the objective tube 5.

A slit 4a is formed in the side wall of the eyepiece barrel 4, through which the connecting member 9 is inserted, and the connecting member 9 can be displaced back and forth within the axial length of the slit 4a.

Now, when the focus ring 8 is rotated in the clockwise direction in FIG. 5 is relatively spaced apart from the eyepiece tube 4, so that a distant view can be brought into focus.

Conversely, when the focus ring 8 is rotated counterclockwise in FIG.
The shaft 7a moves back inside the lens, causing the objective tube 5 to approach the eyepiece tube 4 relatively, thereby bringing the near object into focus.

Here, reference numeral 11 denotes a sealing member constituting the main part of the present invention, and in the case of this embodiment, it is for liquid-tightly sealing the slit 4a formed in the eyepiece tube 4 for passing the connecting rod.

This sealing member 11 is made of a cylindrical body that is elastically deformable like bellows-like rubber and is open at both ends, and is fastened using a ring 12.

One end opening 11a of the sealing member 11 is fitted to the outer periphery of the connecting member 9, and the other end opening 11b is fitted to the opening periphery of the slit 4a of the eyepiece tube 4.

Out of the outer periphery of the connecting member 9 and the periphery of the opening of the slit 4a, grooves 13 and 14 having a triangular cross section are formed in the portion where the openings at both ends of the sealing member 11 fit.
are carved into a ring shape.

These grooves 13 and 14 are provided to improve the sealing performance of the seal member 11.
By tightening the ring 12 at the locations where the grooves 13 and 14 are formed, it is possible to prevent the fitting position of the seal member 11 from shifting and improve the sealing performance.

That is, with respect to the inclined walls of the kerfs 13 and 14,
The sealing member 11 is tightly and liquid-tightly fastened by the ring 12 (water-sealed state).

In this way, the sealing member 11 provides a complete water seal between the focus adjustment mechanism 6 and the eyepiece tube 4 or the objective tube 5.

Further, even if the connecting member 9 is displaced back and forth due to focusing, the sealing member 11 is flexibly deformed, but there is no possibility that the tightening by the ring 12 will loosen.

This is because the sealing member 11 has a shape that allows sufficient deformation of the movable range of the connecting member 9 during focusing, so that rainwater does not always enter the objective tube 5 or the eyepiece tube 4. Infiltration can be reliably prevented.

As explained above, according to the center focus type binoculars 1 having the above configuration, the slit 4a is formed at the location where the connecting member 9, which transmits the displacement of the focus ring 8 to the objective tube 5, passes through the eyepiece tube 4.
Since the structure is such that the opening periphery of the slit 4a and the outer periphery of the connecting member 9 are sealed with a deformable cylindrical sealing member 11 whose openings at both ends are tightened, the eyepiece tube can be sealed without using a complicated sealing mechanism. 4
and a connecting member 9 for relatively displacing the objective tube 5.
can be freely displaced in the sealed state,
This prevents rainwater from entering the objective tube 5 or the eyepiece tube 4, and also protects the objective lens or the eyepiece. Moreover, the sealing member 11 is fastened to the periphery of the opening of the slit 4a and the connecting member 9. The seal member 11 can be easily attached at two locations on the outer periphery of the seal member 11, and manufacturing costs can be reduced.

In the above embodiment, the lens barrels 2 and 3 may have a structure in which the eyepiece barrel 5 is slidably assembled on the outer periphery of the eyepiece barrel 4. In that case, the slit for passing the connecting member is formed in the objective barrel. 5 will be formed.

Further, in the above embodiment, one end of the connecting member 9 is connected to the objective tube 5, but one end of the connecting member 9 may be connected to the eyepiece tube 4.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the center focus type binoculars of the present invention, and FIG.
It is a cross-sectional enlarged view along the A line. 1: Center focus binoculars, 2, 3: Lens tube, 4: Eyepiece tube, 4a: Slit, 5: Objective tube,
6: Focus adjustment mechanism, 9: Connecting member, 11: Seal member, 12: Ring, 13, 14: Cut groove.

Claims (1)

[Scope of utility model registration request] A connecting member 9 has one end fixed to the objective barrel 5 side of the lens barrels 2 and 3 consisting of the eyepiece barrel 4 and the objective barrel 5, and the other end engaged with the engagement groove 10a of the semicircular slider 10. In center focus type binoculars, the focus is adjusted by changing the relative position of the objective tube 5 and the eyepiece tube 4. The seal member 11 is a deformable cylindrical body with an opening, and the opening on the lens barrel side is connected to the outer periphery of the opening of the slit 4a of the lens barrels 2 and 3 with a cut groove 14 formed on the outer periphery via a ring 12. In center focus type binoculars with adjustable eyelids, the opening on the connecting member side is fastened via a ring 12 to the outer periphery of the connecting member 9, which has a cut groove 13 formed on the outer periphery. Water seal mechanism.